I need help with this, I have the tablet, but I don't see an altar or even a jug for that matter. It's pissing me off, I've walked around the room like fifty times, I've checked on this site for help but none of it helps me. I don understand it.
The tablet is referring to a different room. Just keep heading through the lair and look in every room; it will be abundantly clear when you get to the right one. It's huge, has two staircases down, and features a pool in the middle and an altar off to the side.